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Finding the Fourth Proportional to 7,188.99, 10,780.79 and 2,507.80

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Solution

The fourth proportional to 7,188.99, 10,780.79 and 2,507.80 is: 3,760.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.99 : 10,780.79 = 2,507.80 : x
  2. Step 2: Convert to fraction form
    7,188.99/10,780.79 = 2,507.80/x
  3. Step 3: Cross multiply
    7,188.99x = 10,780.79 × 2,507.80
  4. Step 4: Simplify right side
    7,188.99x = 27,036,065.16
  5. Step 5: Solve for x
    x = 27,036,065.16/7,188.99
  6. Step 6: Final answer
    x = 3,760.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.